UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/50.0.2661.102 YaBrowser/16.6.0.8125 Safari/537.36

Steps to reproduce the problem:
1. Remove user profile ~/Library/Application\ Support/Chromium/
2. Compile and run unit_tests:
out/Debug.gn/unit_tests --gtest_filter=LocalDatabaseManagerTest.*

What is the expected behavior?
The tests should use separate temp dir for fake user profile.
So, the dir ~/Library/Application\ Support/Chromium/ shouldn't exist.

What went wrong?
The tests use real user profile: the 
~/Library/Application\ Support/Chromium/ has created again.

So, the state of the profile may affect to test results. 
Second problem is that data race on the profile is possible (between this tests and running browser or other tests with the same problem)    

Did this work before? No 

Chrome version: 50.0.2661.102  Channel: n/a
OS Version: OS X 10.11.5
Flash Version: 

Linux and Win are also affected.